| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.39 | 9.4 | 6.78 |
| 2024 | 8.85 | 12.41 | 5.65 |
| 2023 | 8.13 | 10.35 | 5.81 |
| 2022 | 9.31 | 16.42 | 6.49 |
| 2021 | 13.56 | 18.53 | 8.37 |
| 2020 | 10.16 | 17.64 | 4.8 |
| 2019 | 5.15 | 6.9 | 3.74 |
| 2018 | 5.09 | 7.01 | 3.57 |
| 2017 | 9.18 | 12.07 | 6.24 |
| 2016 | 12.23 | 17.82 | 10.12 |
| 2015 | 13.3 | 30.71 | 4.88 |
| 2014 | 4.3 | 6.21 | 2.73 |
| 2013 | 2.25 | 3.07 | 1.7 |
| 2012 | 2.92 | 4.16 | 1.76 |
| 2011 | 5.08 | 7.21 | 3.37 |